Firefox Won't Start After Reinstall ... Oops!

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  1. Wynona's Avatar
    Posts : 23,590
    Windows 10 Skip Ahead Preview Build 18312
       #1

    Firefox Won't Start After Reinstall ... Oops!


    We have a person who comes in and uses the Sr. Center computers (which is what they're for), but he got a couple of those PUPs that changed the search engine, and Gramma's Lye Soap wouldn't take it off.

    I followed instructions online to remove the PUPs, and something went awry. I think some of the files I removed had replaced some other files, and now they're gone.

    So, now when I try to reinstall FF (at least four times), it tells me "Your Firefox profile cannot be loaded. It may be missing or inaccessible."

    I'm at a loss as to what to do next . . . We use Firefox in the classroom. Help, please?
      My ComputerSystem Spec

  2. f14tomcat's Avatar
    Posts : 42,998
    Triple boot - Win 10 Pro, Win 10 Pro Insider (2) - (and a sprinkling of VMs)
       #2

    Wynona said: View Post
    We have a person who comes in and uses the Sr. Center computers (which is what they're for), but he got a couple of those PUPs that changed the search engine, and Gramma's Lye Soap wouldn't take it off.

    I followed instructions online to remove the PUPs, and something went awry. I think some of the files I removed had replaced some other files, and now they're gone.

    So, now when I try to reinstall FF (at least four times), it tells me "Your Firefox profile cannot be loaded. It may be missing or inaccessible."

    I'm at a loss as to what to do next . . . We use Firefox in the classroom. Help, please?
    Can you restore an Image backup from before the user did that?
      My ComputersSystem Spec

  3. thomaseg1's Avatar
    Posts : 5,016
    Windows 10 Professional (x64) Version 1903
       #3

    Using Revo or another unistaller remove firefox as well as registry entries.
    Run the usual sfc dism scans
    After cold boot try installing FFox again.

    Try TC's idea first
      My ComputersSystem Spec

  4. Wynona's Avatar
    Posts : 23,590
    Windows 10 Skip Ahead Preview Build 18312
    Thread Starter
       #4

    f14tomcat said: View Post
    Can you restore an Image backup from before the user did that?
    Ummm, I don't think I have access to backups of these computers; that is, if they have one. I don't want to call IT Jim out, since he trusts me (bad choice, Jim!) to take care of them.

    I may be able to do a restore. I'll check in a few.
      My ComputerSystem Spec

  5. Wynona's Avatar
    Posts : 23,590
    Windows 10 Skip Ahead Preview Build 18312
    Thread Starter
       #5

    thomaseg1 said: View Post
    Using Revo or another unistaller remove firefox as well as registry entries.
    Run the usual sfc dism scans
    After cold boot try installing FFox again.

    Try TC's idea first
    I'll try Revo, but I think I already did that last week. I'll check to be sure; that may be the way to go.
      My ComputerSystem Spec

  6. thomaseg1's Avatar
    Posts : 5,016
    Windows 10 Professional (x64) Version 1903
       #6

    found while browsing , May not help but is interesting.

    Full Fix: Firefox install got stuck in Windows 10, 8.1, 7
      My ComputersSystem Spec


  7. f14tomcat's Avatar
    Posts : 42,998
    Triple boot - Win 10 Pro, Win 10 Pro Insider (2) - (and a sprinkling of VMs)
       #7

    Wynona said: View Post
    I'll try Revo, but I think I already did that last week. I'll check to be sure; that may be the way to go.
    Just a note, Wynona. If you cannot restore an image:

    Revo-ing Firefox will have no effect on whatever PUPS/PUMS got on there. The scans are still in order. Would also suggest running ADWCleaner, it is designed to go after PUPS, like toolbars and all that stuff.
      My ComputersSystem Spec

  8. Wynona's Avatar
    Posts : 23,590
    Windows 10 Skip Ahead Preview Build 18312
    Thread Starter
       #8

    f14tomcat said: View Post
    Just a note, Wynona. If you cannot restore an image:

    Revo-ing Firefox will have no effect on whatever PUPS/PUMS got on there. The scans are still in order. Would also suggest running ADWCleaner, it is designed to go after PUPS, like toolbars and all that stuff.
    I physically went in and removed the PUPs, TC. I think I shouldn't orta done that. That's why I think the correct files were removed from the folders.
      My ComputerSystem Spec

  9. das10's Avatar
    Posts : 1,188
    Win 10 pro 1903
       #9

    Wynona, did the message "Your Firefox profile cannot be loaded. It may be missing or inaccessible", come up after the installation, but before trying to run Firefox ?

    Only if so, you can start the Firefox Profile Manager, and create a new Profile and make it the default startup profile.

    So, first make sure to terminate any Firefox instances in task manager, and then from a command prompt, try:

    C:\Path...to...\firefox.exe -P


    Also, have a read here, in case there is anything relevant to your particular case:

    Your Firefox profile cannot be loaded. It may be missing or inaccessible. | Firefox Support Forum | Mozilla Support
      My ComputerSystem Spec

  10. DooGie's Avatar
    Posts : 6,637
    Wndows 10 x64 Pro version19H2 18362.10019
       #10

    You've lerned the hard way Wyn, always keep a backup of your FF profile. Moz backup still works very well.
    I've been there before and just built a new profile but it does take some time.
      My ComputerSystem Spec


 
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